Re: [seL4] sel4bench IPC questions

Hi,

1. Making seL4_IPCBuffer and mapping into the thread is necessary?

I think that sending short messages don't need seL4_IPCBuffer, is it right?

Correct. There is a constant defined for each architecture in libsel4 (`seL4_FastMessageRegisters`) which specifies the size of message that can fit into registers.

2. This is seL4_Call annotation in benchmark_param.

/* Call fastpath between client and server in the different address space */

But I can't understand how to measure seL4_Call function performance.

The benchmarks measure cost of IPC 1 way. So in the first case its 2-1.

3. This is seL4_Send annotation in benchmark_param.

/* Send slowpath (no fastpath for send) same prio client-server, different > address space */ But client_prio(seL4_MaxPrio - 1) and server_prio(seL4_MaxPrio - 2) is > different.

The comment here is just incorrect and outdated.

Cheers,

Anna.?

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